[1] Natl Univ Hlth Syst, Div Neurol, Dept Med, 1E Kent Ridge Rd, Singapore 119228, Singapore
[2] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Med, Singapore, Singapore
[3] Hlth Promot Board, Natl Registry Dis Off, Singapore, Singapore
[4] Singapore Gen Hosp, Dept Emergency Med, Singapore, Singapore
[5] Natl Neurosci Inst, Dept Neurol, Singapore Gen Hosp Campus, Singapore, Singapore
[6] Natl Univ Hlth Syst, Dept Neurol, Ng Teng Fong Gen Hosp, Singapore, Singapore
[7] Tan Tock Seng Hosp, Dept Neurol, Natl Inst Neurosci, Singapore, Singapore
[8] Changi Gen Hosp, Dept Rehabil Med, Singapore, Singapore
[9] Mt Elizabeth Med Ctr, Tang Neurol & Med Clin, Singapore, Singapore
[10] Raffles Hosp, Raffles Neurosci Ctr, Singapore, Singapore
[11] Duke Natl Univ Singapore, Sch Med, Cardiovasc & Metab Disorders Program, Singapore, Singapore
[12] Singapore Hlth Serv, Hlth Serv Res Ctr, Singapore, Singapore